Cover or lid for use in connection with air-proof preserve-boxes and the like.



R. JAHN.

COVER OR LID FOR USE IN CONNECTION WITH AIR PROOF PRESERVE BOXES AND THE LIKE.

' APPLICATION FILED NOV. 30, 1912.

1,091,577, Patented Mar.31,1914.

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UNITED STATES PATENT OFFICE.

RICHARD JAHN, OF FRANKFORTON-THE-ODER, GERMANY.

COVER OR LID FOR USE IN CONNECTION WITH AIR-PROOF PRESERVE-BOXES AND THE LIKE.

Specification of Letters Patent.

Patented Mar. 31, 1914.

Application filed November 30, 1912. Serial No. 734,308.

To all whom it may concern Be it known that I, RICHARD JAHN, a subject of the King of Prussia, German Emperor, and resident of .Frankfort-on-the- Oder, in the Kingdom of Prussia, German Empire, have invented a new and useful Cover or Lid for Use in Connection with Air-Proof Preserve-Boxes and the like, of which the following is a specification.

This invention relates in general to preserving boxes and similar vessels of the kind, in which it is possible to produce in the box or vessel, between its cover or lid and the article of food to be preserved a partial vacuum, the cover or lid being pressed upon an india-rubber ring or the like located between said cover and said vessel by the greater pressure of the atmosphere. In particular my invention relates to such :1 cover or lid, 2'. e. to a special construction of the same, and my improvement consists in providing the cover or lid with a clownwardly projection having a plurality of grooves adapted to hold, chiefly by adhesion, spirit or another combustible liquor by means of which the air in the box or vessel above the article of food to be preserved and below the cover or lid may be heated so as to expand. The cover or lid has an opening or aperture through which the excess of the volume of airmay escape, and as soon as the spirit or other combustible liqnor in the said grooves has been consumed, that is to say, when the expansion of the air by the heating has attained the possible maximum, that opening or aperture is closed by a stopper or disk or the like of indiarubber or another suitable material, and as the heated air inclosed in the upper part of the box or vessel cools down, its volume lessens and a partial vacuum arises, where upon the cover or lid is pressed upon the india-rubber or other packing by the greater pressure of atmosphere.

In order to make my invention more clear, I refer to the accompanying drawing in which similar letters refer to similar parts, and in which:

Figure 1, is a vertical section through a preserve glass provided with a cover constructed according to my invention. Fig. 2 is a vertical section through another form of such cover. Fig. 3 is a part of a cover having another shape of the downwardly extending projection, and Fig. dis a similar representation showing also another configuration of the projection.

The cover or lid a Fig. 1, has a downwardly extending pro ection b, which in the form shown resembles a knob. This projection or knob has a number or plurality of horizontal grooves c which are intended to hold, by adhesion, the spirit or other combustible liquor, as stated previously. The cover or lid has also an opening at which may be closed by a stopper 6. When the grooves c, that is to say, practically the whole of the surface of the projection I), are covered with spirit, and this liquor has been ignited, the cover is placed upon the vessel, 2'. 6, upon the packing g of the same, and as soon asthe combustible liquor is consumed, the stopper e is introduced into the opening (Z of the cover, after which the remaining heated and expanded air in the vessel f will cool down and the cover will be pressed, and held fast, upon the vessel so as to prevent any contact of the article of food therein contained and the outer air.

In the form of construction shown in Fig. 2, the horizontal grooves c of Fig. 1 are re placed by vertical ones, 0 and in the form of construction represented in Fig. 3, I have made use of inclined grooves 0 where as in the fourth form represented in Fig. 4 a combination of horizontal and vertical grooves is employed. The projection or knob b of this form of execution has an elongation b containing a comparatively deep groove 6 which is also intended to receive a certain quantity of spirit, for the purpose as described.

As to Fig. 2, there is the other dilference, that there is an india-rubber disk 6 instead of the plug 6, and the aperture d is replaced by a recess (Z having a hole (Z These features do not belong to the essential contents of the invention.

I wish it to be understood, that I do not limit myself to exactly such projections and such grooves as represented in the drawing. These are all merely examples, which allow of many deviations in various respects without departing from the invention.

Having now described my invention, what I desire to secure by a patent of the United States is:

1. A cover for use in connection with preserve vessels, comprising a plate, a downwardly extending rim forming part of said plate and being adapted to fit over the neck of a preserve vessel; and a grooved projection extendin downwardly from the middle of the Said plate slightly beyond said rim, for the purpose as described.

2. A cover for use in connection with preserve vessels, comprising a horizontal plate, a rim extending at right angles to said plate from the periphery of same and being adapted to fit over the neck of a preserve vessel; a grooved projection extending down Copies of this patent may be obtained for wardly from the middle of the said plate slightly beyond said rim, the lower part of said projection forming a circular recess adapted to receive and hold liquid fuel, substantially and for the purpose as described. In testimony whereof I afiiX my signature in presence of two witnesses.

RICHARD J AHN. Witnesses:

TALTHER LUKELAND, HENRY HASPER.

five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

